From 21ae09ada9d367994b3a00c14bce5836a806b899 Mon Sep 17 00:00:00 2001 From: nic Date: Mon, 5 May 2025 10:59:25 -0400 Subject: Auto from nzxt - Mon 05 May 2025 10:59:25 AM EDT --- Technology/Python.md | 65 ---------------------------------------------------- 1 file changed, 65 deletions(-) delete mode 100644 Technology/Python.md (limited to 'Technology/Python.md') diff --git a/Technology/Python.md b/Technology/Python.md deleted file mode 100644 index bc08ed2..0000000 --- a/Technology/Python.md +++ /dev/null @@ -1,65 +0,0 @@ -Python does not have a classpath and unless you are root, you can't install new pkg for the whole system - -# pip installs in - -.local/lib/ - - -virtualenv - solution to pkg management? - isolated space with own instance of python - -virtualenv TESTENV -p python -source TESTENV/bin/activate -# to get out of env -deactivate - -** exponant - -x = 'Mark' -len(x) - function -x.upper() - method - -dir() - built it give directory of an object (all methods available) -with no arg show you all name in global namespace - -dir() == sorted(globals().keys()) - -gloabls() == locals() - -super() - goes trought inheritance chain and return the class that is after the one passed as the function first argument. Can by used to bypass modification made by earlier classes. - - -# Data containers - -list() - [] -dict() - {} -tuple() - () -set() - set() - - - -__ init__ - where to assign instance specific attributes when object first constructed -__ str__ - control how object is printed -__ repr__ - object output when interactive shell -__ eq__ - uniquely identify all created object - - -1st time you import a modules python execute the code inside it. -2nd time will not re-run the code. (usefull when import multiples modules that import all the same modules) -importlib if want to reload modules so run more than once - -When importing a module you can use it's defined functions, classes, constants etc... -Access those thing by putting the module name as prefix before the function - -import X -import X as x -from X import x -from X import x as x - -when you run a modules as a script __ name__ becomes __ main__ - - -__ init__.py - required to tell python dir is a pkg (initialise a pkg) REQUIRED -used to set the __ all__ variable & import submodules - - - -- cgit v1.2.3